<template>
  <div>
    <div>我是ref的子组件</div>
    <div>{{ param }}</div>
  </div>
</template>

<script lang="ts" setup>
import { ref } from 'vue'

let param = ref('hello')
let param2 = ref('world')

defineExpose({ param, param2 })
</script>

<style lang="scss" scoped>

</style>